Handling Events

LDK requires that you handle many different events throughout your app's life cycle. You can learn more by reading about our event-driven architecture.

To start handling events in your application, run:

• Rust
• Kotlin
• Swift

use lightning::util::events::{Event};

// In the event handler passed to BackgroundProcessor::start
match event {
  Event::PaymentSent { payment_preimage } => {
    // Handle successful payment
  }
  Event::PaymentFailed { payment_hash, rejected_by_dest } => {
    // Handle failed payment
  }
  Event::FundingGenerationReady { .. } => {
    // Generate the funding transaction for the channel
  }
}

import org.ldk.structs.Event

if (event is Event.PaymentSent) {
// Handle successful payment
}

if (event is Event.PaymentFailed) {
// Handle failed payment
}

if (event is Event.FundingGenerationReady) {
// Create a funding tx to be broadcast
}

import LightningDevKit

if let event = event.getValueAsPaymentSent() {
  // Handle successful payment
}

if let event = event.getValueAsPaymentFailed() {
  // Handle failed payment
}

if let event = event.getValueAsFundingGenerationReady() {
  // Create a funding tx to be broadcast
}

References: Rust Event docs (opens new window), Java/Kotlin Event bindings (opens new window)